<?xml version="1.0" encoding="UTF-8"?>
<!--
Left outer index apply on master only table, distributed outer child should gather on master.
Non-equal join condition is also fine for master only tables.

create table foo(a varchar, b varchar);
create table bar(a varchar, b varchar);
set optimizer_enable_hashjoin=off;
set optimizer_enable_motion_broadcast = off;
set optimizer_enable_master_only_queries = on;

explain
(select foo.*, relam from foo left join pg_class on foo.a::oid = pg_class.oid)
union all
(select bar.*, typelem from bar left join pg_type on bar.b::oid<pg_type.oid);

                                            QUERY PLAN
 Append  (cost=0.00..2792.17 rows=1 width=20)
   ->  Nested Loop Left Join  (cost=0.00..1403.14 rows=1 width=20)
         Join Filter: true
         ->  Gather Motion 3:1  (slice1; segments: 3)  (cost=0.00..431.00 rows=1 width=16)
               ->  Table Scan on foo  (cost=0.00..431.00 rows=1 width=16)
         ->  Index Scan using pg_class_oid_index on pg_class  (cost=0.00..972.14 rows=54 width=4)
               Index Cond: pg_class.oid = foo.a::oid
   ->  Nested Loop Left Join  (cost=0.00..1389.03 rows=1 width=20)
         Join Filter: true
         ->  Gather Motion 3:1  (slice2; segments: 3)  (cost=0.00..431.00 rows=1 width=16)
               ->  Table Scan on bar  (cost=0.00..431.00 rows=1 width=16)
         ->  Index Scan using pg_type_oid_index on pg_type  (cost=0.00..958.03 rows=54 width=4)
               Index Cond: pg_type.oid > bar.b::oid
 Settings:  optimizer=on; optimizer_nestloop_factor=1
 Optimizer status: PQO version 2.53.9
(15 rows)
-->
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